Specifications

This document is Avnu’s interoperability and functional specification for automotive Ethernet AVB devices. The document’s primary goal is to provide a baseline specification of Ethernet AVB functionality on automotive AVB devices. The specification has several uses, three of which are key. First, vendors can use this specification to guide their automotive AVB product development. Second, Avnu can use it to develop an effective certification process. Third, and most importantly, automotive OEMs can depend on the specification to provide a foundation for AVB functionality in their automobiles. OEMs can be assured that a device certified to be compliant with this specification would provide baseline AVB functionality, would not require extensive testing on their part, and would thereby allow them the time to focus on other functionality that helps differentiate their final product and enable success in the automotive marketplace.

The Generalized Precision Time Protocol (gPTP) provides an accurate time base to all time aware elements in an Ethernet network. Applications such as Audio/Video and Automotive/Industrial Control rely on the time provided by this protocol for synchronization of events. This specification defines methods to measure gPTP recovered clock quality for Avnu certification.

There are a number of methods that can be used for synchronising media clocks on a local area network (LAN). This document defines the Avnu required method for providing interoperable and certified media clock synchronisation for Pro Audio devices.

Test Plans

This document is intended to be representative of the scope and format of a Avnu test plan. Included is a complete Table of Contents of every test case. The last test case is unabridged to convey the level of detail represented in Avnu’s test plans.